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Introduces the boilers, their applications, and conformity with European directives.
Provides detailed physical dimensions for the FORMAT.ZIP 25 OF and 25 BF-30 BF models.
Lists key technical specifications, including heat output, input, water content, and electrical ratings for various models.
Illustrates schematic diagrams of the boiler's functional components for different models with component identification.
Labels and identifies the primary components of the boiler for both "25 OF" and "25 BF-30 BF" models.
Specifies required ventilation openings and conditions for boiler room installation.
Details the optional installation plate and associated kits for mounting the boiler.
Covers pipe connection, gas line setup, and the importance of a gas pipe filter.
Outlines when central heating system water treatment is essential.
Provides instructions for filling and emptying the boiler and heating system, including pressure checks.
Addresses regulations for flue and chimney installation, especially for existing structures.
Explains coaxial duct installation, length limits, and diaphragm selection.
Guides the installation of separate pipes for flue and air intake systems.
Details the procedure for fitting and using the air intake with specific outlet configurations.
Illustrates various examples of different separate outlet system configurations.
Sets minimum distances for positioning forced draught system outlet terminals relative to buildings.
Covers electrical connections, power supply, and crucial grounding requirements for safety.
Instructions for safely accessing the boiler's electrical panel and its components.
Describes how to connect a room thermostat to the electronic board's "TA" connector.
Provides detailed wiring diagrams for both "25 OF" and "25 BF-30 BF" models.
Details the electronic board, its devices, and fault indicators for proper operation.
Explains temperature sensor functions, resistance values, and impact on boiler operation.
Covers the electronic ignition system, safety controls, and the standard operating cycle.
Discusses ignition failures, gas valve issues, and electrode faults during operation.
Describes the "OF" model's smoke safety device, its activation, and reset procedure.
Explains the function of the smoke pressure switch in "BF" models for safe operation.
Details the water pressure switch in "OF" models, its tripping point, and restoration.
Explains the water flow switch operation for hot water and primary circuits in different models.
Presents a graph illustrating available head for the heating system versus flow rate.
Guides electrical wiring for zone heating systems, including thermostat and pump connections.
How to adjust Domestic Hot Water temperature for optimal efficiency and fuel saving.
Procedure for adjusting Domestic Hot Water flow rate and maintaining the filter.
Details the gas valve types and factory settings for gas pressure.
Specific steps for adjusting gas pressure on Honeywell VK 4105M gas valves.
How to adjust Central Heating heat output using the trimmer, referencing performance diagrams.
Steps for converting the boiler to different gas types using the provided kit.
Instructions for removing the boiler's outer skirt for maintenance access.
Procedures for cleaning the boiler's components, including heat exchanger and burner.
Comprehensive guide to identifying and resolving common boiler faults using indicators and checks.
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General